Bernewitz, Von. <br/><br/>
Handbook for prospector and operators of small mines / 
rev. by Harry C. Chellson. 
 - 4th ed. 
 - New York :  McGraw-Hill,  1943. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Wilheim, Max.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Prospecting.